orthodox
Pronunciation: /ˈɔːθədɒks/
adjective
- 1following or conforming to the traditional or generally accepted rules or beliefs of a religion, philosophy, or practice: Burke’s views were orthodox in his time orthodox medical treatment orthodox Hindus
- (of a person) not independent-minded; conventional and unoriginal: a relatively orthodox artist

Origin:
late Middle English: from Greek orthodoxos (probably via ecclesiastical Latin), from orthos 'straight or right' + doxa 'opinion'